Perimetry is computer. Investigation of visual fields. Ophthalmological clinics in St. Petersburg

The organs of vision are of great importance for the perception of the world around us. Thanks to the eyes, people and animals receive 90% of the information. Therefore, problems with the organ of vision are always a reason to seek help from a specialist. Only through the necessary surveys can you understand why there was a violation. The diagnosis of eye pathologies includes measurement of visual acuity, ophthalmoscopy, examination of retinal vessels, as well as computer perimetry. Each of these studies is important for detecting diseases. Thanks to this method it is possible to find out which particular area fell out of the activity.

Description of computer perimetry

Computer perimetry is a method of investigation, through which it is possible to detect a change in the field of view. Normally a person sees not only what is directly in front of him, but also a part of the surrounding objects located on the sides. This function is due to peripheral vision, which is responsible for the brain. At various ophthalmologic and neurologic pathologies the falling out of fields of vision occurs. Such violations include hemianopsia. Falling one or more fields of vision and replacing it with a white shroud is called scotoma. The computer perimetry of the eye makes it possible to estimate the number and size of defects. Also due to it, it is possible to diagnose those visual impairments, which are at an early stage and yet do not manifest clinically. Previously, there were other devices for detection of livestock. Nevertheless, the perimeter of the computer differs from them by the higher accuracy of the calculation of the boundaries of the field of view and the existing defects. This diagnostic method is a safe and non-invasive procedure.

What is the field of vision study for?

The narrowing or complete disappearance of the field of view is a serious violation. The same applies to the loss of its parts - cattle. In some cases, the pathology is not considered ophthalmic, but refers to the brain diseases. Therefore, the following indications for computer perimetry can be distinguished:

1. Dystrophy of the retina of the eye.
2. Disorders of the organ of vision with acids or alkalis, thermal burns.
3. Hemorrhage in the mesh shell.
4. Tumor lesions of the organ of vision. Increases in intraocular pressure - glaucoma.
5. Mesh sheath peeling.
6. Inflammation or lesion of the optic nerve.
7. Brain Injuries.
8. Hemorrhagic and ischemic stroke.
9. Retinopathies due to arterial hypertension and diabetes mellitus.

All these states are quite dangerous, as in neglected cases they can lead to complete blindness.

Technique of computer perimetry

To investigate the field of view, it is necessary to fix a gaze on a certain object. Everything that a person "catches" through the eye outside this image is realized with the help of a peripheral vision. It is worth remembering that the study of vision is contraindicated in some situations. Among them:

1. The state of alcoholic or narcotic intoxication.
2. Emotional lability.
3. Mental retardation.

In all these conditions, the patient is not able to clearly focus and follow the directions of the ophthalmologist. Perimetry computer based on the study of the possibilities of the organ of vision in the formulation of a number of problems. The patient is seated for a special device having an optical system. Each eye is checked separately, while the second is covered by a shutter. First of all, the patient fixes a look at one object. In this way, the breadth of the fields of vision is evaluated. After that, around the main image there are other - different in terms of light and brightness, objects. In this case, the eyes must also be fixed. Next, images on the periphery move in space. Thanks to this method, it is possible to estimate not only the size of the fields of vision, but also the susceptibility to colors, light, and movement.

Types of computer perimetry of the eye

Depending on what kind of "picture" is depicted on the periphery, several types of research are singled out. In most cases, they are all applied in turn. This helps to identify more abnormalities and get an idea of ​​the visual function. Types of computer perimetry:

1. Static. The patient fixes a look at the white point located in the center of the device, and the field of vision at this time is projected on a rounded surface. To accurately record the reading, the lighting is constantly changing.
2. Kinetic. The patient needs to monitor the object that is in motion. While the object is approaching and moving away from the eyes, the device captures the necessary indicators.
3. Campimetry. The examinee must observe the moving white point inside the dark square. The device evaluates the boundaries at which the object disappears and appears again.
4. The Amsler test. The patient is asked to focus the view in the middle of the picture( grating).If the person surveyed sees straight lines, then there is no problem with the reticular membrane.

Computer perimetry: interpretation of this method

After the study, the results are recorded on a map used by ophthalmologists. Normally, the lower and inner boundaries should be equal to 60, the upper limit - 50, and the outer - 90 degrees. The presence of physiological animals is not considered pathology, since they arise from a blind spot on the retina. If the loss of fields is large or multiple, this is due to diseases of the organ of vision or the brain. The hemianopia testifies to the pathology of the optic nerve. By the number and nature of livestock, one can judge such diseases as migraine and glaucoma.

Which ophthalmic clinics in St. Petersburg are conducting the study?

In any large regional center it is possible to be examined for the presence of a vision pathology. The northern capital is no exception. Where can I go through the computer perimetry in the city of St. Petersburg? The following ophthalmological clinics( in St. Petersburg) are known to have a device for this study:

1. Oncoscreening Center.
2. World of Health.
3. Medem Clinic.
4. "Alpha Medica".
5. "Family Doctor".
6. Scientific Research Institute of Experimental Medicine.

The cost of computer perimetry is from 400 to 1200 rubles.